Automatic firearm



L. STANGE April 15, 1930.

Filed June 18, 1929 wfl Em M JJWW N' ll 1 w 0 Z Patented Apr; 15, I

Louis sweeten, or somunnna, GERMANY, ASSIGNbR .r'o nnnmrscnn METALL- wnnann. mun mnscnmnnrannrx, or nnssnnnonr-nnnnnnonr, ennnm AUTOMATIC rmnnnir Application filed June 13, 1929, Serial Ito 371,881, and in Germany November 15, 1928.

I In autbmatic firearms, in which the breech pieceis movable in the axial direction and in which the stock is, applied to the shoulder of the firer, it is important that the Weapon,

besides having a convenient external form, should be also protected against theentrance bf foreign bodies intothe internal parts dis-- placed on firing; In order to shorten the length, it has been previously proposed to make the stock hollow and to constitute the rear guiding member of the ,recoiling breech piece. 7

Such apparatus, in addition to satisfactory sealing of the internal parts, should also be provided with means for ensuringeasy accessto the parts of the Weapon to be protected, more especially the parts of the breech, in order to clean and exchange parts that have become worn, in case of obstructions on firing and to exchange the barrel.

The invention obtains these results, without introducing any upwardly hinged portions-of the wall of the casing which would make the weapon cumbrous, by connecting the stock, forming one part of and the rear closing member of the breech casing, with or without the guide for the breech piece, so that it can at any time be easily disconnected from the other parts of the casing containing the trigger, the breech sleeve and the barrel and after removing the stock the casing can be opened at the-rear end and the parts contained therein be easily accessible and removable.

Figure 1 of the accompanying drawings. il-

breech sleeve is mounted in the casing a in known manner so as to be displaceable inthe,

longitudinal direction. The breech piece g, which can member be locked with the breech sleeve by suitable devices, for example by rotary ribs, is guided longitudinall in the sleeve.

The neck of the stock i2, ormfs a rear continuation of the casing and engages-with asleeve 71. in the casing a and is locked thereto by a bayonet joint h a Aflocking member h mounted in the stock so as to be elastically pressed in the radial direction, by entering into a notch of the casing (1, looks the latter and also the stock'h in the coupling position against relative backward rotation when freed. The locking member in is removable by means of a head in projecting'from the stock and operatedby finger pressure.

The stock it has in the extension of the bore of the barrel a rectilinear longitudinal boring provided with a sleeve in, which forms the rear guiding member for the breech piece .9 as it returns after firing into the stock. in

the sleeve it there is at its rear portion a spring 11, which drives the breech piece for ward into the closed position.

The weaponis of the type in which the I breech pieceis secured in its rear position ready for firing by a locking member released by the trigger and, when the trigger is pressed, is impelled forward, introduces a cartridge into the barrel and then directly after ignites it.

The locking member 70 for holding the breech piece after its return movement is mounted according to theinventionin the stock h which is removable from the casing a of the weapon, It forms an elbow lever, of which-one arm in {projects downwards from the stock, and engages with the rod Z displaceable the casing a and is drawn--- backwards by the trigger 5. a

For securing the breech piece in the stock for its removal with the latter, a locking vice, which can be-released at any time by rovided therein, and the locking hand, is

or holding the-breech piece, or 1n other types of weapon the firing in, in the stressed position before firin can e mounted inthe usual mannerzin't e'casing ofthe weapon.

' As shown in Figure .1,,the brewh piece 9' j is guided in its return path in the stock and is 9 he d in its rearend position by the member c k, whereupon the weapon is; ready for firing;

wards in the longitudinal direction.

If, for example, the barrelis to beexchanged,

the locking member k between thestock, h

and the casing'a is releasedby thepressure of the finger, the stock it is then rotated rela-- tively to the easing, a untilthe'bayonetjoint b (1 is unlocked and the stock is drawn bacle the separation of the stock it (Figure 2) with the parts secured therein and the breech piece g from the weapon, the casing 1s open atthe After stock when said stock and said casing are extension of said sleeve in said casing.

signature.

Louis STANGE,

rear and the breech sleeve with the barrel can I I be drawn out, for exchange, rearwards from i the casinga. The separation of the breech I e I fectedon opening the casing of the weapon,

cpiecefrom the breech sleeve and barrel, ef-

advantageously reduces the timerequired for I exchanging the barrel. Obviously, the stock It could beremoved by itselffrom the weapon.

The return movement of the breech in the I stock, which on firing takes place in a per-- hollow stock guidingsaid breech piece, a was ting, containing a trigger, a breech sleeve and fectly straight line in the prolongation oi the bore of the barrel, excludesthe known canting of the weapon which occurs with arrangementswhich by means of curved guides returnthe breech piece downwards into the stock, The shoulder of the firer receives the recoil directly in the direction of this recoil" so that the gun is not moved on firing.

' I claim:

l. Inan automaticfirearm in combination, a longitudinally e. movable breech piece, a

a barrel, and means for releasably and removably connecting said stock to said casing.

2. In an automatic firearm in combination, a longitudinally movable breech piece, a hollow stock guiding said breech piece, a locking member mounted in said stock and cooperating with said breech piece, a casing,

containing a trigger, a breech sleeve and a barrel, and means for releasably and removably connecting said stock. to said casing.-

'3. In an automatic'firearm in combination, I

a longitudinally movable breech piece, a

hollow stock guiding said breech piece, a

lockingmembermounted in said stock and c0- operating with said breech piece, a casing, containing a trigger, a breech sleeve and a barrel, and means for releasably and removably connecting said stock to said casing,

said locking member holding the breech piece rel, means for releasably and removably conmeeting said stock to said casing, a locking member mounted in said stock for holdin the breech piece 1n its return position in sai connected together, and means for releasing ,saidlocking member by saidtrigger'for firing, said sleeve in said stock forminga hnear In testimony whereof ,I have afiixed my 7 

